在索引上显示下拉列表更改了另一个下拉列表 .net 2.0
本文关键字：下拉列表 另一个 net 索引 显示 | 更新日期: 2023-09-27 18:35:18
我有一个这样的下拉列表。我希望显示另一个下拉列表，具体取决于此下拉列表的所选索引更改。如何使用 javascript 的 onchange 函数来做到这一点？由于我正在处理一个旧项目，因此它在.net 2.0上，这就是为什么我无法使用asp：Dropdown的原因
<select name="myselect" id="myselect" onchange="this.form.submit()">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
</select>
我最近为级联多选dropwon做了，请在下面找到代码，希望对您有所帮助。
<table>
<tr>
<td style="text-align: right;">
<asp:Label ID="lblCountry" runat="server" Font-Size="12px" Text="Country:" Style="margin-top: 19px !important"></asp:Label>
</td>
<td style="text-align: left;">
<select id="ddlCountry" multiple="multiple">
</select>
<asp:HiddenField ID="ddlCountryHid" runat="server" />
</td>
</tr>
<tr>
<td style="text-align: right">
<asp:Label ID="lblState" runat="server" Font-Size="12px" Text="State:" Style="margin-top: 19px !important"></asp:Label>
</td>
<td style="text-align: left;">
<asp:HiddenField ID="ddlStateHid" runat="server" />
<select id="ddlState" multiple="multiple" style="margin-left: 5px;">
</select>
</td>
</tr>
</table>
爪哇语
<script type="text/javascript">
$(document).ready(function () {
$.ajax({
type: "POST",
url: "Index.aspx/GetCountry",
data: '',
contentType: "application/json;charset=utf-8",
dataType: "json",
success: function (data) {
for (var i = 0; i < data.d.length; i++) {
$("#ddlCountry").append($("<option></option>").val(data.d[i].Id).html(data.d[i].Name));
}
//for multiselect
$('#ddlCountry').multiselect({
includeSelectAllOption: true
});
$.ajax({
type: "POST",
url: "Index.aspx/GetSelctedCountry",
data: '',
contentType: "application/json;charset=utf-8",
dataType: "json",
success: function (data) {
var valArr = data.d.split(',');
i = 0, size = valArr.length;
// //for multiselect show the selcted country as selected if
for (var i = 0; i < data.d.length; i++) {
$("#ddlCountry").find(":checkbox[value='" + valArr[i] + "']").attr("checked", "checked");
$("#ddlCountry option[value='" + valArr[i] + "']").attr("selected", 1).change();
$("#ddlCountry").multiselect("refresh");
}
},
error: function (err) {
}
});
},
error: function (err) {
}
});
var obj = {};
obj.state = '';
$.ajax({
type: "POST",
url: "Index.aspx/GetState",
data: JSON.stringify(obj),
contentType: "application/json;charset=utf-8",
dataType: "json",
success: function (data) {
for (var i = 0; i < data.d.length; i++) {
$("#ddlState").append($("<option></option>").val(data.d[i].Id).html(data.d[i].Name));
}
var obj = $("#MainContent_ChildContent2_ddlCountryHid").val();
//for multiselect
$('#ddlState').multiselect({
includeSelectAllOption: true,
height: 50,
});
$('#ddlState').multiselect("disable");
},
error: function (err) {
}
});
$('#ddlState').change(function () {
var d1 = '';
$('#ddlState :checked').each(function (i) {
d1 = d1 + $(this).val() + ',';
});
$("#MainContent_ChildContent2_ddlStateHid").val(d1);
});
$('#ddlCountry').change(function () {
var d = '';
$('#ddlCountry :checked').each(function (i) {
d = d + $(this).val() + ',';
});
$("#MainContent_ChildContent2_ddlCountryHid").val(d);
var obj = {};
obj.state = d;
$.ajax({
type: "POST",
url: "Index.aspx/GetState",
data: JSON.stringify(obj),
contentType: "application/json;charset=utf-8",
dataType: "json",
success: function (data) {
var data1 = '';
$('#ddlState option').each(function (index, option) {
if (data1 == '')
data1 = $(option);
$(option).remove();
});
//for multiselect
$('#ddlState').multiselect({
includeSelectAllOption: true
});
if (data.d.length == 0) {
$("#ddlState").append($("<option></option>").val('').html('')).multiselect("destroy").multiselect();
$("#ddlState").attr('disable', 'disable');
}
for (var i = 0; i < data.d.length; i++) {
$("#ddlState").append($("<option></option>").val(data.d[i].Id).html(data.d[i].Name));
}
$.ajax({
type: "POST",
url: "Index.aspx/GetSelectedState",
data: '',
contentType: "application/json;charset=utf-8",
dataType: "json",
success: function (data) {
var valArr = data.d.split(',');
i = 0, size = valArr.length;
//for multiselect show by default selected
for (i; i < size; i++) {
$("#ddlState").find(":checkbox[value='" + valArr[i] + "']").attr("checked", "checked");
$("#ddlState option[value='" + valArr[i] + "']").attr("selected", 1);
$("#ddlState").multiselect("refresh");
}
},
error: function (err) {
}
});
$('#ddlState').multiselect('rebuild');
$('#ddlState').multiselect({
includeSelectAllOption: true
});
if (data.d.length == 0)
$('#ddlState').multiselect("disable");
else
$('#ddlState').multiselect("enable");
},
error: function (err) {
}
});
});
$('#testid').click(function () {
$('#ddlState option').prop('selected', true);
});
});
</script>